includes/logging/LogPager.php

   1 <?php
   2 /**
   3  * Contain classes to list log entries
   4  *
   5  * Copyright © 2004 Brion Vibber <brion@pobox.com>, 2008 Aaron Schulz
   6  * http://www.mediawiki.org/
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License along
  19  * with this program; if not, write to the Free Software Foundation, Inc.,
  20  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  21  * http://www.gnu.org/copyleft/gpl.html
  22  *
  23  * @file
  24  */
  25
  26 /**
  27  * @ingroup Pager
  28  */
  29 class LogPager extends ReverseChronologicalPager {
  30         private $types = array();
  31         private $performer = '';
  32         private $title = '';
  33         private $pattern = '';
  34         private $typeCGI = '';
  35         public $mLogEventsList;
  36
  37         /**
  38          * Constructor
  39          *
  40          * @param LogEventsList $list
  41          * @param string|array $types Log types to show
  42          * @param string $performer the user who made the log entries
  43          * @param string|Title $title the page title the log entries are for
  44          * @param string $pattern do a prefix search rather than an exact title match
  45          * @param array $conds extra conditions for the query
  46          * @param int|bool $year The year to start from. Default: false
  47          * @param int|bool $month The month to start from. Default: false
  48          * @param string $tagFilter tag
  49          */
  50         public function __construct( $list, $types = array(), $performer = '', $title = '', $pattern = '',
  51                 $conds = array(), $year = false, $month = false, $tagFilter = '' ) {
  52                 parent::__construct( $list->getContext() );
  53                 $this->mConds = $conds;
  54
  55                 $this->mLogEventsList = $list;
  56
  57                 $this->limitType( $types ); // also excludes hidden types
  58                 $this->limitPerformer( $performer );
  59                 $this->limitTitle( $title, $pattern );
  60                 $this->getDateCond( $year, $month );
  61                 $this->mTagFilter = $tagFilter;
  62         }
  63
  64         public function getDefaultQuery() {
  65                 $query = parent::getDefaultQuery();
  66                 $query['type'] = $this->typeCGI; // arrays won't work here
  67                 $query['user'] = $this->performer;
  68                 $query['month'] = $this->mMonth;
  69                 $query['year'] = $this->mYear;
  70
  71                 return $query;
  72         }
  73
  74         // Call ONLY after calling $this->limitType() already!
  75         public function getFilterParams() {
  76                 global $wgFilterLogTypes;
  77                 $filters = array();
  78                 if ( count( $this->types ) ) {
  79                         return $filters;
  80                 }
  81                 foreach ( $wgFilterLogTypes as $type => $default ) {
  82                         // Avoid silly filtering
  83                         if ( $type !== 'patrol' || $this->getUser()->useNPPatrol() ) {
  84                                 $hide = $this->getRequest()->getInt( "hide_{$type}_log", $default );
  85                                 $filters[$type] = $hide;
  86                                 if ( $hide ) {
  87                                         $this->mConds[] = 'log_type != ' . $this->mDb->addQuotes( $type );
  88                                 }
  89                         }
  90                 }
  91
  92                 return $filters;
  93         }
  94
  95         /**
  96          * Set the log reader to return only entries of the given type.
  97          * Type restrictions enforced here
  98          *
  99          * @param string $types or array: Log types ('upload', 'delete', etc);
 100          *   empty string means no restriction
 101          */
 102         private function limitType( $types ) {
 103                 global $wgLogRestrictions;
 104
 105                 $user = $this->getUser();
 106                 // If $types is not an array, make it an array
 107                 $types = ( $types === '' ) ? array() : (array)$types;
 108                 // Don't even show header for private logs; don't recognize it...
 109                 $needReindex = false;
 110                 foreach ( $types as $type ) {
 111                         if ( isset( $wgLogRestrictions[$type] )
 112                                 && !$user->isAllowed( $wgLogRestrictions[$type] )
 113                         ) {
 114                                 $needReindex = true;
 115                                 $types = array_diff( $types, array( $type ) );
 116                         }
 117                 }
 118                 if ( $needReindex ) {
 119                         // Lots of this code makes assumptions that
 120                         // the first entry in the array is $types[0].
 121                         $types = array_values( $types );
 122                 }
 123                 $this->types = $types;
 124                 // Don't show private logs to unprivileged users.
 125                 // Also, only show them upon specific request to avoid suprises.
 126                 $audience = $types ? 'user' : 'public';
 127                 $hideLogs = LogEventsList::getExcludeClause( $this->mDb, $audience, $user );
 128                 if ( $hideLogs !== false ) {
 129                         $this->mConds[] = $hideLogs;
 130                 }
 131                 if ( count( $types ) ) {
 132                         $this->mConds['log_type'] = $types;
 133                         // Set typeCGI; used in url param for paging
 134                         if ( count( $types ) == 1 ) {
 135                                 $this->typeCGI = $types[0];
 136                         }
 137                 }
 138         }
 139
 140         /**
 141          * Set the log reader to return only entries by the given user.
 142          *
 143          * @param string $name (In)valid user name
 144          * @return bool
 145          */
 146         private function limitPerformer( $name ) {
 147                 if ( $name == '' ) {
 148                         return false;
 149                 }
 150                 $usertitle = Title::makeTitleSafe( NS_USER, $name );
 151                 if ( is_null( $usertitle ) ) {
 152                         return false;
 153                 }
 154                 /* Fetch userid at first, if known, provides awesome query plan afterwards */
 155                 $userid = User::idFromName( $name );
 156                 if ( !$userid ) {
 157                         /* It should be nicer to abort query at all,
 158                            but for now it won't pass anywhere behind the optimizer */
 159                         $this->mConds[] = "NULL";
 160                 } else {
 161                         $this->mConds['log_user'] = $userid;
 162                         // Paranoia: avoid brute force searches (bug 17342)
 163                         $user = $this->getUser();
 164                         if ( !$user->isAllowed( 'deletedhistory' ) ) {
 165                                 $this->mConds[] = $this->mDb->bitAnd( 'log_deleted', LogPage::DELETED_USER ) . ' = 0';
 166                         } elseif ( !$user->isAllowed( 'suppressrevision' ) ) {
 167                                 $this->mConds[] = $this->mDb->bitAnd( 'log_deleted', LogPage::SUPPRESSED_USER ) .
 168                                         ' != ' . LogPage::SUPPRESSED_USER;
 169                         }
 170                         $this->performer = $usertitle->getText();
 171                 }
 172         }
 173
 174         /**
 175          * Set the log reader to return only entries affecting the given page.
 176          * (For the block and rights logs, this is a user page.)
 177          *
 178          * @param string $page or Title object: Title name
 179          * @param $pattern String
 180          * @return bool
 181          */
 182         private function limitTitle( $page, $pattern ) {
 183                 global $wgMiserMode;
 184
 185                 if ( $page instanceof Title ) {
 186                         $title = $page;
 187                 } else {
 188                         $title = Title::newFromText( $page );
 189                         if ( strlen( $page ) == 0 || !$title instanceof Title ) {
 190                                 return false;
 191                         }
 192                 }
 193
 194                 $this->title = $title->getPrefixedText();
 195                 $ns = $title->getNamespace();
 196                 $db = $this->mDb;
 197
 198                 # Using the (log_namespace, log_title, log_timestamp) index with a
 199                 # range scan (LIKE) on the first two parts, instead of simple equality,
 200                 # makes it unusable for sorting.  Sorted retrieval using another index
 201                 # would be possible, but then we might have to scan arbitrarily many
 202                 # nodes of that index. Therefore, we need to avoid this if $wgMiserMode
 203                 # is on.
 204                 #
 205                 # This is not a problem with simple title matches, because then we can
 206                 # use the page_time index.  That should have no more than a few hundred
 207                 # log entries for even the busiest pages, so it can be safely scanned
 208                 # in full to satisfy an impossible condition on user or similar.
 209                 if ( $pattern && !$wgMiserMode ) {
 210                         $this->mConds['log_namespace'] = $ns;
 211                         $this->mConds[] = 'log_title ' . $db->buildLike( $title->getDBkey(), $db->anyString() );
 212                         $this->pattern = $pattern;
 213                 } else {
 214                         $this->mConds['log_namespace'] = $ns;
 215                         $this->mConds['log_title'] = $title->getDBkey();
 216                 }
 217                 // Paranoia: avoid brute force searches (bug 17342)
 218                 $user = $this->getUser();
 219                 if ( !$user->isAllowed( 'deletedhistory' ) ) {
 220                         $this->mConds[] = $db->bitAnd( 'log_deleted', LogPage::DELETED_ACTION ) . ' = 0';
 221                 } elseif ( !$user->isAllowed( 'suppressrevision' ) ) {
 222                         $this->mConds[] = $db->bitAnd( 'log_deleted', LogPage::SUPPRESSED_ACTION ) .
 223                                 ' != ' . LogPage::SUPPRESSED_ACTION;
 224                 }
 225         }
 226
 227         /**
 228          * Constructs the most part of the query. Extra conditions are sprinkled in
 229          * all over this class.
 230          * @return array
 231          */
 232         public function getQueryInfo() {
 233                 $basic = DatabaseLogEntry::getSelectQueryData();
 234
 235                 $tables = $basic['tables'];
 236                 $fields = $basic['fields'];
 237                 $conds = $basic['conds'];
 238                 $options = $basic['options'];
 239                 $joins = $basic['join_conds'];
 240
 241                 $index = array();
 242                 # Add log_search table if there are conditions on it.
 243                 # This filters the results to only include log rows that have
 244                 # log_search records with the specified ls_field and ls_value values.
 245                 if ( array_key_exists( 'ls_field', $this->mConds ) ) {
 246                         $tables[] = 'log_search';
 247                         $index['log_search'] = 'ls_field_val';
 248                         $index['logging'] = 'PRIMARY';
 249                         if ( !$this->hasEqualsClause( 'ls_field' )
 250                                 || !$this->hasEqualsClause( 'ls_value' )
 251                         ) {
 252                                 # Since (ls_field,ls_value,ls_logid) is unique, if the condition is
 253                                 # to match a specific (ls_field,ls_value) tuple, then there will be
 254                                 # no duplicate log rows. Otherwise, we need to remove the duplicates.
 255                                 $options[] = 'DISTINCT';
 256                         }
 257                 }
 258                 if ( count( $index ) ) {
 259                         $options['USE INDEX'] = $index;
 260                 }
 261                 # Don't show duplicate rows when using log_search
 262                 $joins['log_search'] = array( 'INNER JOIN', 'ls_log_id=log_id' );
 263
 264                 $info = array(
 265                         'tables' => $tables,
 266                         'fields' => $fields,
 267                         'conds' => array_merge( $conds, $this->mConds ),
 268                         'options' => $options,
 269                         'join_conds' => $joins,
 270                 );
 271                 # Add ChangeTags filter query
 272                 ChangeTags::modifyDisplayQuery( $info['tables'], $info['fields'], $info['conds'],
 273                         $info['join_conds'], $info['options'], $this->mTagFilter );
 274
 275                 return $info;
 276         }
 277
 278         /**
 279          * Checks if $this->mConds has $field matched to a *single* value
 280          * @param $field
 281          * @return bool
 282          */
 283         protected function hasEqualsClause( $field ) {
 284                 return (
 285                         array_key_exists( $field, $this->mConds ) &&
 286                         ( !is_array( $this->mConds[$field] ) || count( $this->mConds[$field] ) == 1 )
 287                 );
 288         }
 289
 290         function getIndexField() {
 291                 return 'log_timestamp';
 292         }
 293
 294         public function getStartBody() {
 295                 wfProfileIn( __METHOD__ );
 296                 # Do a link batch query
 297                 if ( $this->getNumRows() > 0 ) {
 298                         $lb = new LinkBatch;
 299                         foreach ( $this->mResult as $row ) {
 300                                 $lb->add( $row->log_namespace, $row->log_title );
 301                                 $lb->addObj( Title::makeTitleSafe( NS_USER, $row->user_name ) );
 302                                 $lb->addObj( Title::makeTitleSafe( NS_USER_TALK, $row->user_name ) );
 303                                 $formatter = LogFormatter::newFromRow( $row );
 304                                 foreach ( $formatter->getPreloadTitles() as $title ) {
 305                                         $lb->addObj( $title );
 306                                 }
 307                         }
 308                         $lb->execute();
 309                         $this->mResult->seek( 0 );
 310                 }
 311                 wfProfileOut( __METHOD__ );
 312
 313                 return '';
 314         }
 315
 316         public function formatRow( $row ) {
 317                 return $this->mLogEventsList->logLine( $row );
 318         }
 319
 320         public function getType() {
 321                 return $this->types;
 322         }
 323
 324         /**
 325          * @return string
 326          */
 327         public function getPerformer() {
 328                 return $this->performer;
 329         }
 330
 331         /**
 332          * @return string
 333          */
 334         public function getPage() {
 335                 return $this->title;
 336         }
 337
 338         public function getPattern() {
 339                 return $this->pattern;
 340         }
 341
 342         public function getYear() {
 343                 return $this->mYear;
 344         }
 345
 346         public function getMonth() {
 347                 return $this->mMonth;
 348         }
 349
 350         public function getTagFilter() {
 351                 return $this->mTagFilter;
 352         }
 353
 354         public function doQuery() {
 355                 // Workaround MySQL optimizer bug
 356                 $this->mDb->setBigSelects();
 357                 parent::doQuery();
 358                 $this->mDb->setBigSelects( 'default' );
 359         }
 360 }